Decorative lamp



FIG. 1 is a front perspective view of a decorative lamp, according to one preferred embodiment of this invention;

FIG. 2 is a front view of the decorative lamp, as shown in FIG. 1;

FIG. 3 is a rear view of the decorative lamp, as shown in FIG. 1;

FIG. 4 is a top view of the decorative lamp, as shown in FIG. 1; and,

FIG. 5 is a bottom view of the decorative lamp, as shown in FIG. 1.

The broken lines shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a decorative lamp, as shown and described. 